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Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
78-17742-02
Chapter 1 General Troubleshooting
1.7.11 DCC Connection Lost
1.7.11 DCC Connection Lost
Symptom DCC connection is lost. The node usually has alarms and the nodes in the network view have
a gray icon. This symptom is usually accompanied by an EOC alarm.
Possible Cause A lost DCC connection.
Recommended Action Usually accompanied by an EOC alarm. Clear the EOC alarm and verify the
DCC connection as described in the “EOC” alarm.
1.7.12 “Path in Use” Error When Creating a Circuit
Symptom While creating a circuit, you get a “Path in Use” error that prevents you from completing the
circuit creation.
Possible Cause Another user has already selected the same source port to create another circuit.
Recommended Action CTC does not remove a card or port from the available list until a circuit is
completely provisioned. If two users simultaneously select the same source port to create a circuit,
the first user to complete circuit provisioning gets use of the port. The other user gets the “Path in
Use” error. Cancel the circuit creation and start over, or click Back until you return to the initial
circuit creation window. The source port that was previously selected no longer appears in the
available list because it is now part of a provisioned circuit. Select a different available port and
begin the circuit creation process again.
1.7.13 Calculate and Design IP Subnets
Symptom You cannot calculate or design IP subnets on the ONS 15454.
Possible Cause The IP capabilities of the ONS 15454 require specific calculations to properly design
IP subnets.
Recommended Action Cisco provides a free online tool to calculate and design IP subnets. Go to
http://www.cisco.com/techtools/ip_addr.html. For information about ONS 15454 IP capability,
refer to the “Management Network Connectivity” chapter in the Cisco ONS 15454 DWDM
Reference Manual.
1.8 Timing
This section provides solutions to common timing reference errors and alarms.
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